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Goodwill and Purchased Intangible Assets | 6 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND PURCHASED INTANGIBLE ASSETS | NOTE 7 – GOODWILL AND PURCHASED INTANGIBLE ASSETS Goodwill We have four reporting units: Wafer Inspection, Patterning, Global Service and Support (“GSS”), and Others. The following table presents goodwill carrying value and the movements by reporting unit during the six months ended December 31, 2018:
(In thousands) |  | Wafer Inspection |  | Patterning |  | GSS |  | Others |  | Total
Balance as of June 30, 2018 |  | $ | 281,005 |  |  | $ | 53,255 |  |  | $ | 8,039 |  |  | $ | 12,399 |  |  | $ | 354,698 |
Acquired goodwill |  | — |  |  | — |  |  | 4,631 |  |  | 1,176 |  |  | 5,807 |
Foreign currency and other adjustments |  | (25 | ) |  | — |  |  | — |  |  | — |  |  | (25 | )
Balance as of December 31, 2018 |  | $ | 280,980 |  |  | $ | 53,255 |  |  | $ | 12,670 |  |  | $ | 13,575 |  |  | $ | 360,480 |
The change in goodwill during the six months ended December 31, 2018 resulted primarily from the acquisition of certain assets and liabilities of privately-held companies. For additional details, refer to Note 6 “Business Combinations”. As of December 31, 2018, there have been no significant events or circumstances affecting the carrying value of goodwill subsequent to the qualitative assessment performed in the third quarter of the fiscal year ended June 30, 2018. For additional details, refer to Note 6 “Goodwill and Purchased Intangible Assets,” of the Notes to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended June 30, 2018. The next annual assessment of goodwill by reporting unit is scheduled to be performed in the third quarter of the fiscal year ending June 30, 2019. Purchased Intangible Assets The components of purchased intangible assets as of the dates indicated below were as follows:
(In thousands) |  |  | As of December 31, 2018 |  | As of June 30, 2018
Category | Range of Useful Lives |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Amount |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Amount
Existing technology | 4-7 years |  | $ | 166,029 |  |  | $ | 146,001 |  |  | $ | 20,028 |  |  | $ | 160,859 |  |  | $ | 144,202 |  |  | $ | 16,657 |
Trade name/Trademark | 5-7 years |  | 21,073 |  |  | 20,143 |  |  | 930 |  |  | 20,993 |  |  | 20,060 |  |  | 933 |
Customer relationships | 4-7 years |  | 58,050 |  |  | 55,388 |  |  | 2,662 |  |  | 56,680 |  |  | 55,136 |  |  | 1,544 |
Other | <1-5 years |  | 1,270 |  |  | 1,072 |  |  | 198 |  |  | 660 |  |  | 461 |  |  | 199 |
Total |  |  | $ | 246,422 |  |  | $ | 222,604 |  |  | $ | 23,818 |  |  | $ | 239,192 |  |  | $ | 219,859 |  |  | $ | 19,333 |
Purchased intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. For the three months ended December 31, 2018 and 2017, amortization expense for purchased intangible assets was $1.3 million and $1.2 million, respectively. For the six months ended December 31, 2018 and 2017, amortization expense for purchased intangible assets was $2.7 million and $2.4 million, respectively. The change in purchased intangible assets gross carrying amount resulted primarily from the acquisition of certain assets and liabilities of privately-held companies. For additional details, refer to Note 6 “Business Combinations.” Based on the purchased intangible assets gross carrying amount recorded as of December 31, 2018, and assuming no subsequent additions to, or impairment of, the underlying assets, the remaining estimated annual amortization expense is expected to be as follows:
Fiscal year ending June 30: | Amortization (In thousands)
2019 (remaining 6 months) | $ | 2,218 |
2020 | 4,438 |
2021 | 4,438 |
2022 | 4,438 |
2023 | 4,242 |
Thereafter | 4,044 |
Total | $ | 23,818 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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